/*
 * Copyright 2003 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cn.taketoday.context.cglib.proxy;

/**
 * {@link Enhancer} callback that simply returns the value to return from the
 * proxied method. No information about what method is being called is available
 * to the callback, and the type of the returned object must be compatible with
 * the return type of the proxied method. This makes this callback primarily
 * useful for forcing a particular method (through the use of a
 * {@link CallbackFilter} to return a fixed value with little overhead.
 */
@FunctionalInterface
public interface FixedValue extends Callback {
  /**
   * Return the object which the original method invocation should return. This
   * method is called for <b>every</b> method invocation.
   *
   * @return an object matching the type of the return value for every method this
   * callback is mapped to
   */
  Object loadObject() throws Exception;
}
